河北坝上林间种草试验初报

A Preliminary Study on Planting Legumes in Sparse Woodlands in Bashang Plateau in Hebei Province.

河北坝上地区疏林地面积大，地表空闲裸露，低产低质。为此于１９８６～１９８８年进行了林间种植豆科牧草试验。结果表明：增产干草８４３～３６８５．５ｋｇ／ｈｍ￣２，同时杨树高度增加１５．１～２８．７ｃｍ，杨树直径增粗０．１～０．５５ｃｍ，地表覆盖率也显著增加。土壤有机质增加０．２１５％，速效氮增加２２．２９ｐｐｍ。实践证明，疏林地林间种草方法可行，效益显著。

Experiments onplanting Legumes in sparse woodland were carried out in 1986～1988. The results indicated that843.0～3685. 5kg/hm￣2 dry herbage , was increased meannhile the tree height was increased by 15.1～28.7cm, the diameter of the trees was added by 0.1～0.55cm, and the land surface cover rate was increased notably. Moreover,soil organic matter content was increased by 0. 215%, and quick-acting ni-trogen was increased by22.29ppm.It had been proved that Planting Legumes in sparse woodland was a better way of increasihg forage.